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1.1 root 1: /* Compilation switch flag definitions for GNU CC.
2: Copyright (C) 1987, 1988 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
6: GNU CC is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 2, or (at your option)
9: any later version.
10:
11: GNU CC is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU CC; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: /* Name of the input .c file being compiled. */
21: extern char *main_input_filename;
22:
23: enum debug_info_type
24: {
25: NO_DEBUG, /* Write no debug info. */
26: DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
27: SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
1.1.1.2 root 28: DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */
29: XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */
1.1 root 30: };
31:
32: /* Specify which kind of debugging info to generate. */
33: extern enum debug_info_type write_symbols;
34:
35: enum debug_info_level
36: {
37: DINFO_LEVEL_NONE, /* Write no debugging info. */
38: DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
39: DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
40: DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
41: };
42:
43: /* Specify how much debugging info to generate. */
44: extern enum debug_info_level debug_info_level;
45:
1.1.1.2 root 46: #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1.1 root 47: /* Nonzero means use GDB-only extensions of DBX format. */
48: extern int use_gdb_dbx_extensions;
49: #endif
50:
51: /* Nonzero means do optimizations. -opt. */
52:
53: extern int optimize;
54:
55: /* Nonzero means do stupid register allocation. -noreg.
56: Currently, this is 1 if `optimize' is 0. */
57:
58: extern int obey_regdecls;
59:
60: /* Don't print functions as they are compiled and don't print
61: times taken by the various passes. -quiet. */
62:
63: extern int quiet_flag;
64:
65: /* Don't print warning messages. -w. */
66:
67: extern int inhibit_warnings;
68:
69: /* Do print extra warnings (such as for uninitialized variables). -W. */
70:
71: extern int extra_warnings;
72:
73: /* Nonzero to warn about unused local variables. */
74:
75: extern int warn_unused;
76:
77: /* Nonzero to warn about variables used before they are initialized. */
78:
79: extern int warn_uninitialized;
80:
81: /* Nonzero means warn about all declarations which shadow others. */
82:
83: extern int warn_shadow;
84:
85: /* Warn if a switch on an enum fails to have a case for every enum value. */
86:
87: extern int warn_switch;
88:
89: /* Nonzero means warn about function definitions that default the return type
90: or that use a null return and have a return-type other than void. */
91:
92: extern int warn_return_type;
93:
94: /* Nonzero means warn about pointer casts that increase the required
95: alignment of the target type (and might therefore lead to a crash
96: due to a misaligned access). */
97:
98: extern int warn_cast_align;
99:
100: /* Nonzero means warn about any identifiers that match in the first N
101: characters. The value N is in `id_clash_len'. */
102:
103: extern int warn_id_clash;
104: extern int id_clash_len;
105:
106: /* Warn if a function returns an aggregate,
107: since there are often incompatible calling conventions for doing this. */
108:
109: extern int warn_aggregate_return;
110:
111: /* Nonzero if generating code to do profiling. */
112:
113: extern int profile_flag;
114:
115: /* Nonzero if generating code to do profiling on the basis of basic blocks. */
116:
117: extern int profile_block_flag;
118:
119: /* Nonzero for -pedantic switch: warn about anything
120: that standard C forbids. */
121:
122: extern int pedantic;
123:
124: /* Temporarily suppress certain warnings.
125: This is set while reading code from a system header file. */
126:
127: extern int in_system_header;
128:
129: /* Nonzero for -dp: annotate the assembly with a comment describing the
130: pattern and alternative used. */
131:
132: extern int flag_print_asm_name;
133:
134: /* Now the symbols that are set with `-f' switches. */
135:
136: /* Nonzero means `char' should be signed. */
137:
138: extern int flag_signed_char;
139:
140: /* Nonzero means give an enum type only as many bytes as it needs. */
141:
142: extern int flag_short_enums;
143:
144: /* Nonzero for -fcaller-saves: allocate values in regs that need to
145: be saved across function calls, if that produces overall better code.
146: Optional now, so people can test it. */
147:
148: extern int flag_caller_saves;
149:
150: /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
151:
152: extern int flag_pcc_struct_return;
153:
154: /* Nonzero for -fforce-mem: load memory value into a register
155: before arithmetic on it. This makes better cse but slower compilation. */
156:
157: extern int flag_force_mem;
158:
159: /* Nonzero for -fforce-addr: load memory address into a register before
160: reference to memory. This makes better cse but slower compilation. */
161:
162: extern int flag_force_addr;
163:
164: /* Nonzero for -fdefer-pop: don't pop args after each function call;
165: instead save them up to pop many calls' args with one insns. */
166:
167: extern int flag_defer_pop;
168:
169: /* Nonzero for -ffloat-store: don't allocate floats and doubles
170: in extended-precision registers. */
171:
172: extern int flag_float_store;
173:
174: /* Nonzero enables strength-reduction in loop.c. */
175:
176: extern int flag_strength_reduce;
177:
178: /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
179: number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
180: UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
181: unrolled. */
182:
183: extern int flag_unroll_loops;
184:
185: /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
186: This is generally not a win. */
187:
188: extern int flag_unroll_all_loops;
189:
190: /* Nonzero for -fcse-follow-jumps:
191: have cse follow jumps to do a more extensive job. */
192:
193: extern int flag_cse_follow_jumps;
194:
1.1.1.3 ! root 195: /* Nonzero for -fcse-skip-blocks:
! 196: have cse follow a branch around a block. */
! 197:
! 198: extern int flag_cse_skip_blocks;
! 199:
1.1 root 200: /* Nonzero for -fexpensive-optimizations:
201: perform miscellaneous relatively-expensive optimizations. */
202: extern int flag_expensive_optimizations;
203:
204: /* Nonzero for -fwritable-strings:
205: store string constants in data segment and don't uniquize them. */
206:
207: extern int flag_writable_strings;
208:
209: /* Nonzero means don't put addresses of constant functions in registers.
210: Used for compiling the Unix kernel, where strange substitutions are
211: done on the assembly output. */
212:
213: extern int flag_no_function_cse;
214:
215: /* Nonzero for -fomit-frame-pointer:
216: don't make a frame pointer in simple functions that don't require one. */
217:
218: extern int flag_omit_frame_pointer;
219:
220: /* Nonzero to inhibit use of define_optimization peephole opts. */
221:
222: extern int flag_no_peephole;
223:
224: /* Nonzero means all references through pointers are volatile. */
225:
226: extern int flag_volatile;
227:
1.1.1.3 ! root 228: /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
! 229: operations in the interest of optimization. For example it allows
! 230: GCC to assume arguments to sqrt are nonnegative numbers, allowing
! 231: faster code for sqrt to be generated. */
! 232:
! 233: extern int flag_fast_math;
! 234:
1.1 root 235: /* Nonzero means make functions that look like good inline candidates
236: go inline. */
237:
238: extern int flag_inline_functions;
239:
240: /* Nonzero for -fkeep-inline-functions: even if we make a function
241: go inline everywhere, keep its defintion around for debugging
242: purposes. */
243:
244: extern int flag_keep_inline_functions;
245:
246: /* Nonzero means that functions declared `inline' will be treated
247: as `static'. Prevents generation of zillions of copies of unused
248: static inline functions; instead, `inlines' are written out
249: only when actually used. Used in conjunction with -g. Also
250: does the right thing with #pragma interface. */
251:
252: extern int flag_no_inline;
253:
254: /* Nonzero if we are only using compiler to check syntax errors. */
255:
256: extern int flag_syntax_only;
257:
1.1.1.2 root 258: /* Nonzero means we should save auxiliary info into a .X file. */
1.1 root 259:
260: extern int flag_gen_aux_info;
261:
262: /* Nonzero means make the text shared if supported. */
263:
264: extern int flag_shared_data;
265:
266: /* flag_schedule_insns means schedule insns within basic blocks (before
267: local_alloc).
268: flag_schedule_insns_after_reload means schedule insns after
269: global_alloc. */
270:
271: extern int flag_schedule_insns;
272: extern int flag_schedule_insns_after_reload;
273:
274: /* Nonzero means put things in delayed-branch slots if supported. */
275:
276: extern int flag_delayed_branch;
277:
278: /* Nonzero means pretend it is OK to examine bits of target floats,
279: even if that isn't true. The resulting code will have incorrect constants,
280: but the same series of instructions that the native compiler would make. */
281:
282: extern int flag_pretend_float;
283:
284: /* Nonzero means change certain warnings into errors.
285: Usually these are warnings about failure to conform to some standard. */
286:
287: extern int flag_pedantic_errors;
288:
289: /* Nonzero means generate position-independent code.
290: This is not fully implemented yet. */
291:
292: extern int flag_pic;
293:
294: /* Nonzero means place uninitialized global data in the bss section. */
295:
296: extern int flag_no_common;
297:
298: /* -finhibit-size-directive inhibits output of .size for ELF.
299: This is used only for compiling crtstuff.c,
300: and it may be extended to other effects
301: needed for crtstuff.c on other systems. */
302: extern int flag_inhibit_size_directive;
303:
1.1.1.3 ! root 304: /* -fverbose-asm causes extra commentary information to be produced in
! 305: the generated assembly code (to make it more readable). This option
! 306: is generally only of use to those who actually need to read the
! 307: generated assembly code (perhaps while debugging the compiler itself). */
! 308:
! 309: extern int flag_verbose_asm;
! 310:
1.1 root 311: /* -fgnu-linker specifies use of the GNU linker for initializations.
312: -fno-gnu-linker says that collect will be used. */
313: extern int flag_gnu_linker;
314:
315: /* Other basic status info about current function. */
316:
317: /* Nonzero means current function must be given a frame pointer.
318: Set in stmt.c if anything is allocated on the stack there.
319: Set in reload1.c if anything is allocated on the stack there. */
320:
321: extern int frame_pointer_needed;
322:
323: /* Set nonzero if jump_optimize finds that control falls through
324: at the end of the function. */
325:
326: extern int can_reach_end;
327:
328: /* Nonzero if function being compiled receives nonlocal gotos
329: from nested functions. */
330:
331: extern int current_function_has_nonlocal_label;
332:
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